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Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL)

The standard libraries of the Quilt ecosystem. Essential for your modding experience on Quilt!

newest supported 1.21Library
Latest version
no release indexed
Minecraft
1.18.2 to 1.21
Java
Java 21+
Loader
Quilt
Licence
Apache-2.0
Downloads
1.7M
Updated
20 mo ago
Available on
Modrinth

Minecraft versions

Every version Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL) declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21Quilt21+declared13 Jun 2024
1.20.6Quilt21+declared29 Apr 2024
1.20.4Quilt17+declared7 Dec 2023
1.20.2Quilt17+declared20 Sept 2023
1.20.1Quilt17+declared12 Jun 2023
1.20Quilt17+declared2 Jun 2023
1.20-rc1Quilt17+declared31 May 2023
1.20-pre7Quilt17+declared29 May 2023
1.20-pre6Quilt17+declared25 May 2023
1.20-pre5Quilt17+declared23 May 2023
1.19.4Quilt17+declared14 Mar 2023
1.19.4-rc2Quilt17+declared10 Mar 2023
1.19.4-pre3Quilt17+declared1 Mar 2023
1.19.3Quilt17+declared7 Dec 2022
1.19.3-rc1Quilt17+declared1 Dec 2022
22w43aQuilt17+declared26 Oct 2022
1.19.2Quilt17+declared5 Aug 2022
1.19.1Quilt17+declared27 Jul 2022
1.19.1-rc2Quilt17+declared21 Jul 2022
1.19.1-pre6Quilt17+declared20 Jul 2022
1.19.1-pre4Quilt17+declared8 Jul 2022
1.19.1-pre2Quilt17+declared30 Jun 2022
1.19.1-rc1Quilt17+declared23 Jun 2022
1.19.1-pre1Quilt17+declared21 Jun 2022
22w24aQuilt17+declared15 Jun 2022
1.19Quilt17+declared7 Jun 2022
1.18.2Quilt17+declared28 Feb 2022

Frequently asked

Does Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL) work on Minecraft 1.21?

Yes. 1.21 is the newest Minecraft version Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL) declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL) support?

Everything the author has declared, from 1.18.2 up to 1.21. The full list is in the table above, with the Java runtime each version needs next to it.

Which loader does Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL) need?

Quilt. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL)?

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the mod itself.

What licence is Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL) under?

Apache-2.0, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL)?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL) safely?

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Works on the same versions

Ordered by how much of the Minecraft version coverage overlaps, not by popularity.

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Last checked 1 d ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.